Research of wireless ad-hoc and sensor networks is continuing to produce potential solutions to the networking scenarios that require efficient and dynamic communications among distributed mobile users over relatively bandwidth-constrained wireless links. The distributed sensing capabilities and the ease of deployment of sensors enable various interesting applications, such as monitoring the environment to collect information, assisting emergence/rescue operations and forming vehicle and military networks, etc. The related subjects are enormously complex, involving many concepts, protocols, technologies, algorithms, and products that work together in an intricate manner. This workshop is focused on the issues that arise in designing wireless sensor and ad-hoc networks, including both the practice of employing wireless sensors in real-world applications and the fundamental/theoretical basis that leads to building such applications. We hope to provide a forum for sharing ideas and experience among researchers and practitioners working on state-of-the-art techniques in this challenging field.